Isomerization, industrial

John E. Bauer, Feng Xu, Paula L. Bogdan, and Gregory J. Cajda 

For hydrocarbons of more than three carbons, mulhple isomers are possible. Among those isomers, the natural or equilibrium distributions rarely match the commercial demand. Isomerization technology provides the means to convert the less valuable isomers into more valued ones. Specific isomerization reaction mechanisms involve species of relatively similar size, so zeolites, with their precise morphologies, can be made into exceptional catalysts with high selectivity. The ability to adjust zeolite chemistry through innovative synthesis or postsynthesis treatments further enhances their versatihty in isomerization applicahons. 

Metal-Zeolite Catalyzed Light Paraffin Isomerization 

Zeolites in Industrial Separation and Catalysis. Edited by Santi Kulprathipanja Copyright 2010 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-32505-4 

Components Boiling point (°C) RONC Density (g/cm ) RVP (psi lOpsi = 68.95 kPa) 

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Able to form Ag salt of lower solubility than AgQ in H2O. Therefore applications in photographic processes Inhibition of histidine decarboxylase activity Antifoggant for color films Anthelmintic activity Quenching for oil composition caialj si for the industrial isomerization of cis a, (3 unsaturaied carboxylic acids rubber vul-cankzate improver... 

Upgrading of natural-gas liquids to motor fuels with customary technology used in the petroleum industry (isomerization, hydroisomerization, etc.) represents difficulties. One reason is that the volatility of motor fuels cannot be increased, thus limiting treatments such as hydrocracking. 

Traditionally, industrial isomerization processes involve the use of Bronsted and Lewis acids, such as HjSO, and AICI3 that are uneconomical to recycle for most of the chemical applications. Replacement of such bulk chemicals with recyclable zeolites is a very attractive... 

Catalyst in petroleum and organic chemical industry (isomerization, polymerzation. 

The objective is to evaluate commercial catalysts based on platinum (Ptl, Pt2, and Pt3), comparing them on the activity and selectivity for use in an industrial isomerization of xylenes. 

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